55445707646 has 24 divisors (see below), whose sum is σ = 96789686760. Its totient is φ = 23751986832.

The previous prime is 55445707609. The next prime is 55445707649. The reversal of 55445707646 is 64670754455.

It is a happy number.

It is a super-2 number, since 2×55445707646² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55445707649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101345 + ... + 348083.

It is an arithmetic number, because the mean of its divisors is an integer number (4032903615).

Almost surely, 2^55445707646 is an apocalyptic number.

55445707646 is a deficient number, since it is larger than the sum of its proper divisors (41343979114).

55445707646 is a wasteful number, since it uses less digits than its factorization.

55445707646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249048 (or 249041 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 53.

The spelling of 55445707646 in words is "fifty-five billion, four hundred forty-five million, seven hundred seven thousand, six hundred forty-six".